Cuprum
Cuprum is a sans serif font in 4 weights with italics, also available as a variable font. Its lowercase letters are 19% narrower than the typical sans serif font. Last updated 8 September 2025.
Editing a PDF that uses Cuprum
Most PDFs embed only the letters they already use. Type a new letter and many editors either refuse or swap in a different font. MythosPDF recognises Cuprum from the widths stored in your PDF, loads the complete open font, and sets your new text in Cuprum itself. The rest of the page is carried over untouched.
Measured metrics
| Average lowercase letter width | 422.9 units per 1000 em |
|---|---|
| Average capital letter width | 485.8 units per 1000 em |
| Word space | 250 units per 1000 em |
| Digits | proportional (digit widths differ) |
| Spacing | proportional |
| Width of i compared with m | 33% |
| Printable ASCII characters covered | 94 of 94 |
| Category | Sans serif |
Weights and styles
Languages beyond basic Latin
Open fonts closest to Cuprum
Measured on every printable character both fonts contain. A smaller difference means the same words take the same space, so lines break in the same places.
- Fira Sans Extra Condensed Regularsimilar widths (26.1 units)
- Saira Condensed Regularsimilar widths (26.3 units)
- Jockey One Regularloosely similar widths (30.7 units)
- Ubuntu Condensed Regularloosely similar widths (31.1 units)
- Cossette Titre Regularloosely similar widths (31.4 units)
- Markazi Text Regularloosely similar widths (32.1 units)
- Oranienbaum Regularloosely similar widths (33.6 units)
- Akshar Regularloosely similar widths (33.9 units)
Compare Cuprum
Questions people ask
+Can I edit a PDF that uses Cuprum?
Yes. Drop the PDF into MythosPDF and click the text. New letters are set in Cuprum itself, loaded from the open font, so the edit matches the rest of the page.
+Is Cuprum free to use?
Cuprum is released under the SIL Open Font License 1.1, an open licence that allows free use in documents, including commercial ones. Check the licence text for your exact use.
+Which font is closest to Cuprum?
By measured letter widths, Fira Sans Extra Condensed is the closest match among open fonts (a mean difference of 26.1 units per 1000 em). Text set in one takes almost the same space in the other.
+Which languages does Cuprum support?
It includes these character sets: Cyrillic, Cyrillic Extended, Latin, Central European, Vietnamese.
Ready to fix your PDF?
Free, in your browser, and it takes about a minute. No account needed.